Question: C. What is dimensionality reduction? 1. A technique that involves increasing the number of variables in a dataset. 2. A technique that involves reducing the

C. What is dimensionality reduction?

1. A technique that involves increasing the number of variables in a dataset.

2. A technique that involves reducing the number of features or variables in a dataset while retaining as much information as possible.

3. A technique used to detect anomalies in a dataset.

4. A technique used for customer segmentation.

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